Biology And Biomedical Sciences BIOL 2960 Lecture Notes - Lecture 6: Thyroid Hormones, Isoleucine, Phenylalanine
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13 Dec 2016
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Starch (amylopectin form) is less branched than glycogen, branches occur around every 30 monomers on average: cellulose, made of unbranched chains of glucose monomers, contains -1,4 linkages. They cannot be digested by human enzymes: structural element in plant cell wall, one of the most abundant molecules in nature, pack neatly because of h-bonding between adjacent parallel linear chains. Are very strong and can pack into a crystal array (make up cellulose microfibrils and other strong organic materials: -glucose monomers can be viewed as alternating flipped orientations to better visualize the -glycosidic linkage. Remember: they are saturated with hydrogens (so all single bonds btw c-h) Lipids containing saturated fa chains are typically more rigid: a fa chain is said to be unsaturated if there is 1 or more c-c double bonds, resulting in a bent or kinked structure. Lipids containing unsaturated fa chains are typically more fluid: phospholipids, properties, composed of two fa chains, glycerol, a phosphate, and a polar group.
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